java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:35:50,364 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:35:50,366 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:35:50,382 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:35:50,382 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:35:50,384 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:35:50,385 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:35:50,387 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:35:50,389 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:35:50,390 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:35:50,391 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 11:35:50,391 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 11:35:50,392 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 11:35:50,393 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 11:35:50,394 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 11:35:50,395 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 11:35:50,396 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 11:35:50,398 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 11:35:50,400 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 11:35:50,401 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 11:35:50,402 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 11:35:50,404 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 11:35:50,406 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-02 11:35:50,420 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:35:50,445 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:35:50,446 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:35:50,446 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:35:50,447 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:35:50,449 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:35:50,449 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:35:50,450 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:35:50,450 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:35:50,450 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:35:50,450 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:35:50,450 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:35:50,451 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:35:50,451 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:35:50,451 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:35:50,451 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:35:50,451 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:35:50,452 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:35:50,452 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:35:50,452 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:35:50,452 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:35:50,453 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:35:50,453 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:35:50,453 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:35:50,453 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:35:50,453 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:35:50,454 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:35:50,454 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:35:50,454 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:35:50,454 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:35:50,454 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:35:50,496 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:35:50,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:35:50,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:35:50,515 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:35:50,516 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:35:50,516 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-10-02 11:35:50,517 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl' [2018-10-02 11:35:50,568 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:35:50,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:35:50,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:35:50,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:35:50,573 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:35:50,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... [2018-10-02 11:35:50,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... [2018-10-02 11:35:50,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:35:50,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:35:50,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:35:50,614 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:35:50,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... [2018-10-02 11:35:50,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... [2018-10-02 11:35:50,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... [2018-10-02 11:35:50,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... [2018-10-02 11:35:50,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... [2018-10-02 11:35:50,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... [2018-10-02 11:35:50,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... [2018-10-02 11:35:50,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:35:50,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:35:50,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:35:50,634 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:35:50,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:35:50,710 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-02 11:35:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:35:50,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:35:50,938 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:35:50,939 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:35:50 BoogieIcfgContainer [2018-10-02 11:35:50,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:35:50,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:35:50,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:35:50,943 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:35:50,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:35:50" (1/2) ... [2018-10-02 11:35:50,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562b7259 and model type const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:35:50, skipping insertion in model container [2018-10-02 11:35:50,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:35:50" (2/2) ... [2018-10-02 11:35:50,947 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-10-02 11:35:50,957 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:35:50,964 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:35:51,011 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:35:51,012 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:35:51,012 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:35:51,013 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:35:51,013 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:35:51,013 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:35:51,013 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:35:51,013 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:35:51,014 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:35:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-02 11:35:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 11:35:51,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:51,037 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 11:35:51,038 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:51,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-02 11:35:51,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:51,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:51,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:51,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:51,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:51,207 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:35:51,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:35:51,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:35:51,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:35:51,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:35:51,225 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-02 11:35:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:51,262 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-02 11:35:51,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:35:51,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 11:35:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:51,275 INFO L225 Difference]: With dead ends: 9 [2018-10-02 11:35:51,275 INFO L226 Difference]: Without dead ends: 5 [2018-10-02 11:35:51,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:35:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-02 11:35:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-02 11:35:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-02 11:35:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-02 11:35:51,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-02 11:35:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:51,314 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-02 11:35:51,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:35:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-02 11:35:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:35:51,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:51,315 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 11:35:51,315 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:51,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-10-02 11:35:51,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:51,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:51,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:51,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:51,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:51,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:51,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:51,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:51,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:51,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:51,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:35:51,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:35:51,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:35:51,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:35:51,566 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-02 11:35:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:51,655 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-02 11:35:51,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:35:51,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-02 11:35:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:51,656 INFO L225 Difference]: With dead ends: 8 [2018-10-02 11:35:51,656 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 11:35:51,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:35:51,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 11:35:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 11:35:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 11:35:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 11:35:51,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-02 11:35:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:51,661 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 11:35:51,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:35:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 11:35:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:35:51,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:51,662 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-02 11:35:51,662 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:51,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-10-02 11:35:51,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:51,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:51,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:51,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:51,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:51,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:51,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:51,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:35:51,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:35:51,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:51,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:52,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:52,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:35:52,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:35:52,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:35:52,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:35:52,019 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-02 11:35:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:52,137 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 11:35:52,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:35:52,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-02 11:35:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:52,139 INFO L225 Difference]: With dead ends: 9 [2018-10-02 11:35:52,139 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:35:52,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:35:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:35:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:35:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:35:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 11:35:52,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-02 11:35:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:52,143 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 11:35:52,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:35:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 11:35:52,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:35:52,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:52,144 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-02 11:35:52,145 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:52,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:52,145 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-10-02 11:35:52,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:52,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:52,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:52,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:52,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:52,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:52,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:52,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:35:52,352 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 11:35:52,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:52,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:52,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:52,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:35:52,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:35:52,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:35:52,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:35:52,386 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-02 11:35:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:52,447 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-02 11:35:52,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:35:52,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-02 11:35:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:52,448 INFO L225 Difference]: With dead ends: 10 [2018-10-02 11:35:52,448 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:35:52,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:35:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:35:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:35:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:35:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 11:35:52,453 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-02 11:35:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:52,453 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 11:35:52,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:35:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 11:35:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:35:52,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:52,454 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-02 11:35:52,455 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:52,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:52,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-10-02 11:35:52,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:52,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:52,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:52,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:52,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:52,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:52,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:52,766 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:35:52,786 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:35:52,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:52,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:52,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:52,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:35:52,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:35:52,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:35:52,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:35:52,823 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-02 11:35:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:52,916 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:35:52,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:35:52,917 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-02 11:35:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:52,917 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:35:52,917 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:35:52,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:35:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:35:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:35:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:35:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 11:35:52,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-02 11:35:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:52,922 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 11:35:52,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:35:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 11:35:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:35:52,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:52,923 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-02 11:35:52,924 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:52,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-10-02 11:35:52,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:52,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:52,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:52,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:52,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:53,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:53,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:53,097 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:35:53,117 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 11:35:53,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:53,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:53,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:53,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:35:53,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:35:53,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:35:53,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:35:53,148 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-02 11:35:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:53,201 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-02 11:35:53,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:35:53,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-02 11:35:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:53,203 INFO L225 Difference]: With dead ends: 12 [2018-10-02 11:35:53,203 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:35:53,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:35:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:35:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 11:35:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:35:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 11:35:53,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-02 11:35:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:53,207 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 11:35:53,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:35:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 11:35:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:35:53,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:53,208 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-02 11:35:53,208 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:53,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:53,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-10-02 11:35:53,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:53,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:53,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:53,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:53,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:53,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:53,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:53,411 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:35:53,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-02 11:35:53,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:53,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:53,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:53,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:35:53,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:35:53,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:35:53,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:35:53,492 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-02 11:35:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:53,568 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:35:53,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:35:53,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-02 11:35:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:53,571 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:35:53,571 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:35:53,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:35:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:35:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:35:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:35:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 11:35:53,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-02 11:35:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:53,576 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 11:35:53,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:35:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 11:35:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:35:53,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:53,577 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-02 11:35:53,577 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:53,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:53,578 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-10-02 11:35:53,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:53,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:53,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:53,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:53,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:53,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:53,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:53,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:53,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:53,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:53,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:35:53,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:35:53,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:35:53,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:35:53,997 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-02 11:35:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:54,099 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-02 11:35:54,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:35:54,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-02 11:35:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:54,100 INFO L225 Difference]: With dead ends: 14 [2018-10-02 11:35:54,100 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 11:35:54,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:35:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 11:35:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 11:35:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:35:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 11:35:54,104 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-02 11:35:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:54,104 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 11:35:54,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:35:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 11:35:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:35:54,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:54,105 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-02 11:35:54,106 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:54,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-10-02 11:35:54,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:54,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:54,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:54,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:54,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:54,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:54,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:54,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:35:54,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:35:54,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:54,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:54,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:54,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:35:54,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:35:54,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:35:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:35:54,317 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-02 11:35:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:54,376 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 11:35:54,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:35:54,382 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-02 11:35:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:54,383 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:35:54,383 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:35:54,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:35:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:35:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:35:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:35:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 11:35:54,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-02 11:35:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:54,387 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 11:35:54,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:35:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 11:35:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:35:54,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:54,388 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-02 11:35:54,388 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:54,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:54,388 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-10-02 11:35:54,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:54,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:54,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:54,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:54,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:54,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:54,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:54,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:35:54,721 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:35:54,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:54,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:54,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:54,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:35:54,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:35:54,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:35:54,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:35:54,758 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-02 11:35:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:54,789 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-02 11:35:54,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:35:54,790 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-02 11:35:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:54,791 INFO L225 Difference]: With dead ends: 16 [2018-10-02 11:35:54,791 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:35:54,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:35:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:35:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 11:35:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:35:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 11:35:54,795 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-02 11:35:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:54,796 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 11:35:54,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:35:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 11:35:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:35:54,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:54,796 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-02 11:35:54,797 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:54,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-10-02 11:35:54,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:54,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:54,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:54,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:54,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:55,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:55,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:55,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:35:55,049 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:35:55,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:55,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:55,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:55,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:35:55,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:35:55,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:35:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:35:55,084 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-02 11:35:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:55,157 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:35:55,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:35:55,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-02 11:35:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:55,159 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:35:55,160 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:35:55,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:35:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:35:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:35:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:35:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 11:35:55,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-02 11:35:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:55,164 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 11:35:55,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:35:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 11:35:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:35:55,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:55,165 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-02 11:35:55,166 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:55,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:55,166 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-10-02 11:35:55,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:55,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:55,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:55,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:55,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:55,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:55,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:55,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:35:55,391 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:35:55,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:55,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:55,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:55,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:35:55,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:35:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:35:55,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:35:55,429 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-02 11:35:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:55,493 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-02 11:35:55,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:35:55,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-02 11:35:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:55,495 INFO L225 Difference]: With dead ends: 18 [2018-10-02 11:35:55,495 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:35:55,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:35:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:35:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 11:35:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:35:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 11:35:55,500 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-02 11:35:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:55,501 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 11:35:55,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:35:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 11:35:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:35:55,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:55,502 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-02 11:35:55,502 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:55,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:55,502 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-10-02 11:35:55,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:55,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:55,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:55,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:55,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:55,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:55,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:55,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:35:55,771 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:35:55,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:55,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:55,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:55,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:35:55,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:35:55,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:35:55,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:35:55,810 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-02 11:35:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:55,846 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 11:35:55,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:35:55,849 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-02 11:35:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:55,849 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:35:55,850 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:35:55,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:35:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:35:55,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:35:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:35:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 11:35:55,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-02 11:35:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:55,854 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 11:35:55,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:35:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 11:35:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:35:55,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:55,855 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-02 11:35:55,855 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:55,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:55,856 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-10-02 11:35:55,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:55,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:55,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:55,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:55,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:56,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:56,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:56,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:56,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:56,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:56,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:35:56,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:35:56,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:35:56,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:35:56,202 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-02 11:35:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:56,478 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-02 11:35:56,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:35:56,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-02 11:35:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:56,480 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:35:56,480 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:35:56,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:35:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:35:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 11:35:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:35:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 11:35:56,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-02 11:35:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:56,484 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 11:35:56,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:35:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 11:35:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:35:56,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:56,485 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-02 11:35:56,486 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:56,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-10-02 11:35:56,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:56,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:56,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:56,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:56,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:56,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:56,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:56,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:35:56,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:35:56,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:56,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:56,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:56,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:35:56,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:35:56,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:35:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:35:56,880 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-02 11:35:57,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:57,107 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:35:57,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:35:57,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-02 11:35:57,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:57,108 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:35:57,108 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:35:57,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:35:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:35:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:35:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:35:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 11:35:57,113 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-02 11:35:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:57,113 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 11:35:57,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:35:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 11:35:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:35:57,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:57,114 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-02 11:35:57,115 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:57,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-10-02 11:35:57,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:57,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:57,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:57,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:57,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:57,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:57,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:57,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:35:57,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:35:57,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:57,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:57,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:57,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:35:57,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:35:57,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:35:57,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:35:57,429 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-02 11:35:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:57,475 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-02 11:35:57,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:35:57,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-02 11:35:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:57,476 INFO L225 Difference]: With dead ends: 22 [2018-10-02 11:35:57,476 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:35:57,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:35:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:35:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 11:35:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:35:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 11:35:57,479 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-02 11:35:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:57,480 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 11:35:57,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:35:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 11:35:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:35:57,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:57,481 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-02 11:35:57,481 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:57,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:57,481 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-10-02 11:35:57,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:57,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:57,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:57,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:57,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:58,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:58,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:58,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:35:58,046 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:35:58,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:58,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:58,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:58,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:35:58,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:35:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:35:58,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:35:58,093 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-02 11:35:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:58,342 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 11:35:58,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:35:58,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-02 11:35:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:58,343 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:35:58,343 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:35:58,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:35:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:35:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:35:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:35:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 11:35:58,347 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-02 11:35:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:58,347 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 11:35:58,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:35:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 11:35:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:35:58,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:58,348 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-02 11:35:58,348 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:58,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-10-02 11:35:58,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:58,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:58,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:58,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:58,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:58,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:58,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:58,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:35:58,772 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 11:35:58,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:58,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:58,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:58,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:35:58,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:35:58,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:35:58,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:35:58,812 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-02 11:35:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:58,883 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-02 11:35:58,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:35:58,885 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-02 11:35:58,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:58,886 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:35:58,886 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 11:35:58,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:35:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 11:35:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 11:35:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:35:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 11:35:58,892 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-02 11:35:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:58,892 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 11:35:58,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:35:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 11:35:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 11:35:58,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:58,898 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-02 11:35:58,898 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:58,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-10-02 11:35:58,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:58,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:58,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:58,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:58,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:59,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:59,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:59,178 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:35:59,222 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-02 11:35:59,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:59,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:59,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:59,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:35:59,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:35:59,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:35:59,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:35:59,260 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-02 11:35:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:59,344 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:35:59,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:35:59,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-02 11:35:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:59,345 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:35:59,345 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:35:59,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:35:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:35:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:35:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:35:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 11:35:59,349 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-02 11:35:59,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:59,350 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 11:35:59,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:35:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 11:35:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:35:59,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:59,351 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-02 11:35:59,351 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:59,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:59,351 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-10-02 11:35:59,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:59,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:59,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:59,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:59,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:59,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:59,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:35:59,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:59,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:59,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:59,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:35:59,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:35:59,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:35:59,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:35:59,690 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-02 11:35:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:59,833 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-02 11:35:59,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:35:59,833 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-02 11:35:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:59,834 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:35:59,834 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 11:35:59,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:35:59,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 11:35:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 11:35:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:35:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 11:35:59,837 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-02 11:35:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:59,837 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 11:35:59,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:35:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 11:35:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:35:59,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:59,838 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-02 11:35:59,838 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:59,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-10-02 11:35:59,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:59,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:59,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:59,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:59,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:00,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:00,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:00,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:00,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:00,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:00,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:00,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:00,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:36:00,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:36:00,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:36:00,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:36:00,231 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-02 11:36:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:00,287 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 11:36:00,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:36:00,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-02 11:36:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:00,289 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:36:00,289 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:36:00,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:36:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:36:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:36:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:36:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 11:36:00,293 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-02 11:36:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:00,294 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 11:36:00,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:36:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 11:36:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:36:00,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:00,295 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-02 11:36:00,295 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:00,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-10-02 11:36:00,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:00,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:00,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:00,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:00,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:00,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:00,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:00,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:00,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 11:36:00,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:00,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:00,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:00,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:36:00,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:36:00,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:36:00,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:36:00,703 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-02 11:36:00,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:00,775 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-02 11:36:00,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:36:00,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-02 11:36:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:00,778 INFO L225 Difference]: With dead ends: 28 [2018-10-02 11:36:00,778 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 11:36:00,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:36:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 11:36:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 11:36:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:36:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 11:36:00,783 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-02 11:36:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:00,783 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 11:36:00,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:36:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 11:36:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 11:36:00,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:00,784 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-02 11:36:00,785 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:00,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-10-02 11:36:00,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:00,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:00,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:00,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:00,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:01,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:01,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:01,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:01,225 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:01,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:01,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:01,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:01,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:36:01,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:36:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:36:01,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:36:01,263 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-02 11:36:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:01,309 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:36:01,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:36:01,310 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-02 11:36:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:01,311 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:36:01,311 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:36:01,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:36:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:36:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:36:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:36:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 11:36:01,315 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-02 11:36:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:01,316 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 11:36:01,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:36:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 11:36:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:36:01,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:01,317 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-02 11:36:01,317 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:01,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:01,317 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-10-02 11:36:01,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:01,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:01,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:01,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:01,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:01,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:01,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:01,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:01,766 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 11:36:01,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:01,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:01,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:01,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:36:01,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:36:01,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:36:01,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:36:01,814 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-02 11:36:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:01,910 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-02 11:36:01,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:36:01,911 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-02 11:36:01,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:01,912 INFO L225 Difference]: With dead ends: 30 [2018-10-02 11:36:01,912 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:36:01,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:36:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:36:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 11:36:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:36:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 11:36:01,918 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-02 11:36:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:01,918 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 11:36:01,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:36:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 11:36:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 11:36:01,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:01,919 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-02 11:36:01,919 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:01,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:01,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-10-02 11:36:01,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:01,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:01,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:01,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:01,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:02,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:02,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:02,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:36:02,769 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:36:02,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:02,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:02,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:02,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:36:02,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:36:02,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:36:02,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:36:02,811 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-02 11:36:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:02,871 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 11:36:02,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:36:02,871 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-02 11:36:02,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:02,872 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:36:02,872 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:36:02,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:36:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:36:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:36:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:36:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 11:36:02,877 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-02 11:36:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:02,877 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 11:36:02,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:36:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 11:36:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:36:02,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:02,878 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-02 11:36:02,879 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:02,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-10-02 11:36:02,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:02,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:02,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:02,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:02,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:03,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:03,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:03,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:03,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:03,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:03,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:36:03,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:36:03,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:36:03,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:36:03,986 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-02 11:36:04,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:04,042 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-02 11:36:04,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:36:04,043 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-02 11:36:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:04,044 INFO L225 Difference]: With dead ends: 32 [2018-10-02 11:36:04,044 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 11:36:04,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:36:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 11:36:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 11:36:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:36:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 11:36:04,047 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-02 11:36:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:04,048 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 11:36:04,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:36:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 11:36:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 11:36:04,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:04,048 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-02 11:36:04,049 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:04,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:04,049 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-10-02 11:36:04,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:04,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:04,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:04,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:04,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:04,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:04,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:04,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:04,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:04,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:04,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:04,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:04,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:36:04,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:36:04,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:36:04,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:36:04,991 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-02 11:36:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:05,154 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:36:05,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:36:05,154 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-02 11:36:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:05,155 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:36:05,155 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:36:05,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:36:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:36:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:36:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:36:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 11:36:05,159 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-02 11:36:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:05,159 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 11:36:05,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:36:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 11:36:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:36:05,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:05,160 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-02 11:36:05,160 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:05,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-10-02 11:36:05,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:05,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:05,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:05,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:05,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:05,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:05,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:05,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:05,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 11:36:05,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:05,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:05,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:05,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:36:05,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:36:05,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:36:05,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:36:05,901 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-02 11:36:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:05,948 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-02 11:36:05,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:36:05,949 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-02 11:36:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:05,949 INFO L225 Difference]: With dead ends: 34 [2018-10-02 11:36:05,949 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:36:05,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:36:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:36:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 11:36:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:36:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 11:36:05,953 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-02 11:36:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:05,954 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 11:36:05,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:36:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 11:36:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 11:36:05,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:05,955 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-02 11:36:05,955 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:05,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:05,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-10-02 11:36:05,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:05,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:05,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:05,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:05,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:06,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:06,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:06,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:06,437 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:06,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:06,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:06,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:06,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:36:06,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:36:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:36:06,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:36:06,470 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-02 11:36:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:06,526 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 11:36:06,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:36:06,527 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-02 11:36:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:06,527 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:36:06,527 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:36:06,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:36:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:36:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:36:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:36:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 11:36:06,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-02 11:36:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:06,532 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 11:36:06,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:36:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 11:36:06,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:36:06,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:06,533 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-02 11:36:06,533 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:06,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:06,533 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-10-02 11:36:06,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:06,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:06,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:06,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:06,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:06,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:06,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:06,947 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:06,978 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 11:36:06,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:06,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:07,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:07,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:36:07,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:36:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:36:07,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:36:07,024 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-02 11:36:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:07,229 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-02 11:36:07,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:36:07,230 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-02 11:36:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:07,230 INFO L225 Difference]: With dead ends: 36 [2018-10-02 11:36:07,230 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 11:36:07,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:36:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 11:36:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 11:36:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:36:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 11:36:07,233 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-02 11:36:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:07,233 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 11:36:07,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:36:07,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 11:36:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 11:36:07,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:07,234 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-02 11:36:07,234 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:07,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-10-02 11:36:07,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:07,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:07,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:07,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:07,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:07,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:07,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:07,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:36:07,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 11:36:07,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:08,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:08,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:08,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:36:08,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:36:08,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:36:08,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:36:08,052 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-02 11:36:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:08,302 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:36:08,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:36:08,302 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-02 11:36:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:08,303 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:36:08,303 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:36:08,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:36:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:36:08,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:36:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:36:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 11:36:08,308 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-02 11:36:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:08,308 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 11:36:08,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:36:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 11:36:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:36:08,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:08,309 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-02 11:36:08,309 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:08,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-10-02 11:36:08,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:08,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:08,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:08,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:08,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:09,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:09,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:09,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:09,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:09,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:09,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:36:09,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:36:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:36:09,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:36:09,480 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-02 11:36:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:09,539 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-02 11:36:09,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:36:09,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-02 11:36:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:09,540 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:36:09,540 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 11:36:09,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:36:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 11:36:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 11:36:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:36:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 11:36:09,545 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-02 11:36:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:09,545 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 11:36:09,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:36:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 11:36:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 11:36:09,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:09,546 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-02 11:36:09,546 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:09,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:09,546 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-10-02 11:36:09,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:09,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:09,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:09,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:09,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:10,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:10,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:10,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:10,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:10,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:10,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:10,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:10,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:36:10,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:36:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:36:10,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:36:10,201 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-02 11:36:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:10,270 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 11:36:10,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:36:10,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-02 11:36:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:10,272 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:36:10,272 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:36:10,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:36:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:36:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:36:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:36:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 11:36:10,276 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-02 11:36:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:10,276 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 11:36:10,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:36:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 11:36:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:36:10,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:10,277 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-02 11:36:10,277 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:10,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-10-02 11:36:10,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:10,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:10,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:10,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:10,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:10,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:10,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:10,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:10,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 11:36:10,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:10,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:10,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:10,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:36:10,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:36:10,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:36:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:36:10,851 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-02 11:36:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:10,997 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-02 11:36:10,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:36:10,998 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-02 11:36:10,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:10,998 INFO L225 Difference]: With dead ends: 40 [2018-10-02 11:36:10,998 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 11:36:10,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:36:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 11:36:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 11:36:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 11:36:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 11:36:11,002 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-02 11:36:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:11,002 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 11:36:11,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:36:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 11:36:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 11:36:11,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:11,003 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-02 11:36:11,003 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:11,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:11,003 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-10-02 11:36:11,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:11,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:11,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:11,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:11,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:11,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:11,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:11,799 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:11,828 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:11,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:11,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:11,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:11,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:36:11,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:36:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:36:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:36:11,869 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-02 11:36:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:11,938 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:36:11,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:36:11,938 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-02 11:36:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:11,939 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:36:11,939 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:36:11,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:36:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:36:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:36:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:36:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 11:36:11,942 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-02 11:36:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:11,942 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 11:36:11,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:36:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 11:36:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:36:11,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:11,943 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-02 11:36:11,943 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:11,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:11,944 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-10-02 11:36:11,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:11,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:11,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:11,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:11,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:12,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:12,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:12,508 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:12,547 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 11:36:12,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:12,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:12,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:12,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:36:12,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:36:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:36:12,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:36:12,585 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-02 11:36:12,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:12,664 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-02 11:36:12,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:36:12,665 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-02 11:36:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:12,665 INFO L225 Difference]: With dead ends: 42 [2018-10-02 11:36:12,665 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:36:12,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:36:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:36:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 11:36:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:36:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 11:36:12,668 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-02 11:36:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:12,669 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 11:36:12,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:36:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 11:36:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 11:36:12,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:12,669 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-02 11:36:12,669 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:12,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-10-02 11:36:12,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:12,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:12,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:12,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:12,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:13,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:13,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:13,810 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:36:13,862 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:36:13,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:13,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:13,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:13,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:36:13,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:36:13,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:36:13,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:36:13,907 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-02 11:36:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:14,420 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 11:36:14,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:36:14,421 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-02 11:36:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:14,421 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:36:14,421 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:36:14,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:36:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:36:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:36:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:36:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 11:36:14,425 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-02 11:36:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:14,425 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 11:36:14,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:36:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 11:36:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:36:14,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:14,426 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-02 11:36:14,426 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:14,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:14,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-10-02 11:36:14,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:14,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:14,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:14,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:14,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:15,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:15,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:15,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:15,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:15,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:15,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:36:15,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:36:15,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:36:15,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:36:15,975 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-02 11:36:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:16,038 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-02 11:36:16,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:36:16,039 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-02 11:36:16,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:16,039 INFO L225 Difference]: With dead ends: 44 [2018-10-02 11:36:16,039 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 11:36:16,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:36:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 11:36:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 11:36:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 11:36:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 11:36:16,043 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-02 11:36:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:16,043 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 11:36:16,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:36:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 11:36:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 11:36:16,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:16,045 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-02 11:36:16,045 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:16,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-10-02 11:36:16,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:16,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:16,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:16,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:16,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:16,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:16,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:16,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:16,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:16,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:16,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:16,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:16,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:36:16,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:36:16,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:36:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:36:16,788 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-02 11:36:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:17,042 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:36:17,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:36:17,042 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-02 11:36:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:17,043 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:36:17,043 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:36:17,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:36:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:36:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:36:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:36:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 11:36:17,047 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-02 11:36:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:17,047 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 11:36:17,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:36:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 11:36:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:36:17,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:17,048 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-02 11:36:17,048 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:17,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-10-02 11:36:17,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:17,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:17,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:17,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:17,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:18,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:18,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:18,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:18,048 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 11:36:18,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:18,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:18,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:18,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:36:18,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:36:18,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:36:18,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:36:18,081 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-02 11:36:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:18,167 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-02 11:36:18,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:36:18,167 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-02 11:36:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:18,168 INFO L225 Difference]: With dead ends: 46 [2018-10-02 11:36:18,168 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 11:36:18,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:36:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 11:36:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 11:36:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 11:36:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 11:36:18,172 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-02 11:36:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:18,172 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 11:36:18,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:36:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 11:36:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 11:36:18,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:18,172 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-02 11:36:18,173 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:18,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-10-02 11:36:18,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:18,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:18,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:18,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:18,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:19,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:19,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:19,189 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:19,246 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:19,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:19,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:19,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:19,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:36:19,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:36:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:36:19,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:36:19,298 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-02 11:36:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:19,517 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 11:36:19,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:36:19,517 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-02 11:36:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:19,518 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:36:19,518 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:36:19,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:36:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:36:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:36:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:36:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 11:36:19,522 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-02 11:36:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:19,522 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 11:36:19,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:36:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 11:36:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:36:19,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:19,523 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-02 11:36:19,523 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:19,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:19,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-10-02 11:36:19,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:19,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:19,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:19,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:19,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:20,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:20,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:20,362 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:20,405 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 11:36:20,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:20,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:20,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:20,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:36:20,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:36:20,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:36:20,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:36:20,440 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-02 11:36:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:20,495 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-02 11:36:20,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:36:20,495 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-02 11:36:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:20,496 INFO L225 Difference]: With dead ends: 48 [2018-10-02 11:36:20,496 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 11:36:20,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:36:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 11:36:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 11:36:20,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 11:36:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 11:36:20,499 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-02 11:36:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:20,499 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 11:36:20,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:36:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 11:36:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 11:36:20,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:20,500 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-02 11:36:20,500 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:20,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-10-02 11:36:20,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:20,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:20,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:20,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:20,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:21,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:21,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:21,231 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:36:21,285 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-02 11:36:21,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:21,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:21,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:21,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:36:21,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:36:21,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:36:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:36:21,323 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-02 11:36:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:21,416 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:36:21,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:36:21,416 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-02 11:36:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:21,417 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:36:21,417 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:36:21,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:36:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:36:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:36:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:36:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 11:36:21,420 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-02 11:36:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:21,420 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 11:36:21,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:36:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 11:36:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:36:21,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:21,421 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-02 11:36:21,421 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:21,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:21,422 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-10-02 11:36:21,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:21,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:21,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:21,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:21,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:22,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:22,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:22,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:22,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:22,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:22,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:36:22,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:36:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:36:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:36:22,444 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-02 11:36:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:22,581 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-02 11:36:22,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:36:22,582 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-02 11:36:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:22,582 INFO L225 Difference]: With dead ends: 50 [2018-10-02 11:36:22,583 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 11:36:22,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:36:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 11:36:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 11:36:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 11:36:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 11:36:22,585 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-02 11:36:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:22,586 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 11:36:22,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:36:22,586 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 11:36:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 11:36:22,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:22,587 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-02 11:36:22,587 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:22,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:22,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-10-02 11:36:22,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:22,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:22,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:22,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:22,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:23,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:23,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:23,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:23,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:23,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:23,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:23,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:23,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:36:23,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:36:23,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:36:23,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:36:23,553 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-02 11:36:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:23,662 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 11:36:23,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:36:23,662 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-02 11:36:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:23,663 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:36:23,663 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:36:23,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:36:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:36:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:36:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:36:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 11:36:23,667 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-02 11:36:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:23,667 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 11:36:23,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:36:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 11:36:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:36:23,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:23,668 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-02 11:36:23,668 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:23,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-10-02 11:36:23,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:23,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:23,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:23,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:23,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:24,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:24,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:24,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:24,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 11:36:24,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:24,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:24,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:24,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:36:24,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:36:24,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:36:24,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:36:24,830 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-02 11:36:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:25,243 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-02 11:36:25,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:36:25,244 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-02 11:36:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:25,245 INFO L225 Difference]: With dead ends: 52 [2018-10-02 11:36:25,245 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:36:25,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:36:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:36:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 11:36:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 11:36:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 11:36:25,248 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-02 11:36:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:25,248 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 11:36:25,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:36:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 11:36:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 11:36:25,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:25,248 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-02 11:36:25,249 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:25,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:25,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-10-02 11:36:25,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:25,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:25,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:25,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:25,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:26,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:26,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:26,221 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:26,260 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:26,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:26,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:26,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:26,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:36:26,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:36:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:36:26,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:36:26,303 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-02 11:36:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:26,374 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:36:26,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:36:26,375 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-02 11:36:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:26,375 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:36:26,376 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:36:26,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:36:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:36:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:36:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:36:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 11:36:26,379 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-02 11:36:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:26,379 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 11:36:26,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:36:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 11:36:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:36:26,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:26,380 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-02 11:36:26,380 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:26,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-10-02 11:36:26,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:26,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:26,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:26,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:26,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:27,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:27,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:27,341 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:27,392 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 11:36:27,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:27,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:27,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:27,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:36:27,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:36:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:36:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:36:27,440 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-02 11:36:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:27,563 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-02 11:36:27,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:36:27,564 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-02 11:36:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:27,564 INFO L225 Difference]: With dead ends: 54 [2018-10-02 11:36:27,565 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 11:36:27,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:36:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 11:36:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 11:36:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:36:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 11:36:27,569 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-02 11:36:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:27,569 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 11:36:27,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:36:27,569 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 11:36:27,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 11:36:27,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:27,570 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-02 11:36:27,570 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:27,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:27,571 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-10-02 11:36:27,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:27,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:27,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:27,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:27,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:29,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:29,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:29,205 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:36:29,268 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:36:29,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:29,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:29,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:29,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:36:29,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:36:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:36:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:36:29,305 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-02 11:36:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:29,403 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 11:36:29,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:36:29,404 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-02 11:36:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:29,404 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:36:29,405 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:36:29,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:36:29,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:36:29,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:36:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:36:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 11:36:29,407 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-02 11:36:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:29,407 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 11:36:29,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:36:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 11:36:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:36:29,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:29,408 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-02 11:36:29,408 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:29,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:29,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-10-02 11:36:29,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:29,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:29,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:29,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:29,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:30,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:30,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:30,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:30,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:30,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:30,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:36:30,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:36:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:36:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:36:30,745 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-02 11:36:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:30,835 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-02 11:36:30,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:36:30,835 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-02 11:36:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:30,836 INFO L225 Difference]: With dead ends: 56 [2018-10-02 11:36:30,836 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 11:36:30,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:36:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 11:36:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 11:36:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:36:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 11:36:30,840 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-02 11:36:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:30,841 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 11:36:30,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:36:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 11:36:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:36:30,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:30,841 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-02 11:36:30,842 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:30,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:30,842 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-10-02 11:36:30,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:30,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:30,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:30,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:30,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:31,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:31,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:31,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:31,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:31,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:31,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:32,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:32,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:36:32,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:36:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:36:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:36:32,035 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-02 11:36:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:32,235 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:36:32,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:36:32,235 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-02 11:36:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:32,236 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:36:32,236 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:36:32,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:36:32,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:36:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:36:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:36:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 11:36:32,239 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-02 11:36:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:32,239 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 11:36:32,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:36:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 11:36:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:36:32,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:32,240 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-02 11:36:32,240 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:32,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:32,240 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-10-02 11:36:32,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:32,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:32,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:32,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:32,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:33,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:33,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:33,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:33,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 11:36:33,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:33,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:33,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:33,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 11:36:33,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:36:33,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:36:33,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:36:33,622 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-02 11:36:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:33,949 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-02 11:36:33,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:36:33,950 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-02 11:36:33,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:33,950 INFO L225 Difference]: With dead ends: 58 [2018-10-02 11:36:33,950 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 11:36:33,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:36:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 11:36:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 11:36:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:36:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-02 11:36:33,953 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-02 11:36:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:33,953 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-02 11:36:33,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:36:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-02 11:36:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 11:36:33,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:33,954 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-02 11:36:33,954 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:33,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:33,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-10-02 11:36:33,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:33,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:33,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:33,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:33,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:35,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:35,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:35,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:35,362 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:35,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:35,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:35,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:35,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 11:36:35,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:36:35,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:36:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:36:35,402 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-02 11:36:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:35,502 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 11:36:35,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:36:35,502 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-02 11:36:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:35,503 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:36:35,503 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:36:35,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:36:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:36:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:36:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:36:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-02 11:36:35,505 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-02 11:36:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:35,507 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-02 11:36:35,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:36:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-02 11:36:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:36:35,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:35,507 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-02 11:36:35,508 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:35,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-10-02 11:36:35,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:35,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:35,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:35,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:35,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:36,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:36,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:36,733 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:36,790 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 11:36:36,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:36,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:36,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:36,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:36:36,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:36:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:36:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:36:36,839 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-02 11:36:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:36,929 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-02 11:36:36,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:36:36,930 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-02 11:36:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:36,931 INFO L225 Difference]: With dead ends: 60 [2018-10-02 11:36:36,931 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 11:36:36,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:36:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 11:36:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 11:36:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 11:36:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-02 11:36:36,934 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-02 11:36:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:36,934 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-02 11:36:36,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:36:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-02 11:36:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 11:36:36,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:36,935 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-02 11:36:36,935 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:36,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-10-02 11:36:36,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:36,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:36,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:36,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:36,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:38,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:38,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:38,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:36:38,276 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-02 11:36:38,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:38,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:38,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:38,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 11:36:38,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:36:38,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:36:38,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:36:38,325 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-02 11:36:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:38,431 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:36:38,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:36:38,431 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-02 11:36:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:38,432 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:36:38,432 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:36:38,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:36:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:36:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:36:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:36:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 11:36:38,434 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-02 11:36:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:38,434 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 11:36:38,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:36:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 11:36:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:36:38,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:38,435 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-02 11:36:38,435 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:38,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:38,435 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-10-02 11:36:38,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:38,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:38,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:38,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:38,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:39,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:39,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:39,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:40,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:40,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:40,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:36:40,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:36:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:36:40,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:36:40,048 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-02 11:36:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:40,158 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-02 11:36:40,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:36:40,158 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-02 11:36:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:40,159 INFO L225 Difference]: With dead ends: 62 [2018-10-02 11:36:40,159 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 11:36:40,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:36:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 11:36:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 11:36:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 11:36:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-02 11:36:40,163 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-02 11:36:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:40,163 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-02 11:36:40,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:36:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-02 11:36:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 11:36:40,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:40,164 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-02 11:36:40,164 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:40,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:40,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-10-02 11:36:40,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:40,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:40,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:40,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:40,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:41,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:41,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:41,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:41,450 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:41,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:41,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:41,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:41,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 11:36:41,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:36:41,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:36:41,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:36:41,484 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-02 11:36:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:41,586 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 11:36:41,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:36:41,586 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-02 11:36:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:41,587 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:36:41,587 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:36:41,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:36:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:36:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:36:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:36:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-02 11:36:41,591 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-02 11:36:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:41,591 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-02 11:36:41,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:36:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-02 11:36:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:36:41,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:41,592 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-02 11:36:41,592 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:41,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-10-02 11:36:41,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:41,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:41,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:41,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:41,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:42,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:42,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:42,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:42,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-02 11:36:42,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:42,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:43,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:43,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 11:36:43,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:36:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:36:43,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:36:43,024 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-02 11:36:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:43,155 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-02 11:36:43,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:36:43,156 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-02 11:36:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:43,157 INFO L225 Difference]: With dead ends: 64 [2018-10-02 11:36:43,157 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 11:36:43,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:36:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 11:36:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-02 11:36:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 11:36:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-02 11:36:43,162 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-02 11:36:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:43,163 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-02 11:36:43,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:36:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-02 11:36:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-02 11:36:43,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:43,164 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-02 11:36:43,164 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:43,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:43,164 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-10-02 11:36:43,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:43,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:43,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:43,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:43,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:45,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:45,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:45,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:45,649 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:45,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:45,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:45,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:45,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 11:36:45,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:36:45,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:36:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:36:45,691 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-02 11:36:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:45,809 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 11:36:45,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:36:45,809 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-02 11:36:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:45,810 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:36:45,810 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:36:45,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:36:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:36:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:36:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:36:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 11:36:45,813 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-02 11:36:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:45,813 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 11:36:45,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:36:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 11:36:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:36:45,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:45,814 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-02 11:36:45,814 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:45,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:45,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-10-02 11:36:45,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:45,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:45,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:45,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:45,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:49,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:49,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:49,701 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:49,766 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-02 11:36:49,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:49,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:49,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:49,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:36:49,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:36:49,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:36:49,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:36:49,816 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-02 11:36:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:50,013 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-02 11:36:50,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:36:50,013 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-02 11:36:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:50,014 INFO L225 Difference]: With dead ends: 66 [2018-10-02 11:36:50,014 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 11:36:50,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:36:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 11:36:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 11:36:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 11:36:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-02 11:36:50,017 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-02 11:36:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:50,018 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-02 11:36:50,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:36:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-02 11:36:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 11:36:50,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:50,018 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-02 11:36:50,018 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:50,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:50,019 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-10-02 11:36:50,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:50,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:50,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:50,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:50,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:51,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:51,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:51,618 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:36:51,677 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:36:51,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:51,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:51,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:51,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-02 11:36:51,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:36:51,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:36:51,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:36:51,725 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-02 11:36:51,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:51,826 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 11:36:51,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:36:51,827 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-02 11:36:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:51,828 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:36:51,828 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:36:51,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:36:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:36:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:36:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:36:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-02 11:36:51,830 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-02 11:36:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:51,830 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-02 11:36:51,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:36:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-02 11:36:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:36:51,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:51,831 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-02 11:36:51,831 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:51,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:51,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-10-02 11:36:51,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:51,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:51,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:51,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:51,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:53,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:53,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:53,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:53,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:53,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:53,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:36:53,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:36:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:36:53,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:36:53,330 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-02 11:36:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:53,416 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-02 11:36:53,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:36:53,417 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-02 11:36:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:53,418 INFO L225 Difference]: With dead ends: 68 [2018-10-02 11:36:53,418 INFO L226 Difference]: Without dead ends: 66 [2018-10-02 11:36:53,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:36:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-02 11:36:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-02 11:36:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 11:36:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-02 11:36:53,421 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-02 11:36:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:53,421 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-02 11:36:53,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:36:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-02 11:36:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 11:36:53,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:53,422 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-02 11:36:53,422 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:53,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-10-02 11:36:53,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:53,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:53,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:53,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:53,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:56,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:56,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:56,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:57,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:57,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:57,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:57,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:57,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 11:36:57,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:36:57,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:36:57,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:36:57,091 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-02 11:36:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:57,238 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 11:36:57,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:36:57,238 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-02 11:36:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:57,239 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:36:57,239 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:36:57,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:36:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:36:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:36:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:36:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 11:36:57,243 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-02 11:36:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:57,243 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 11:36:57,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:36:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 11:36:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:36:57,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:57,244 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-02 11:36:57,244 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:57,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-10-02 11:36:57,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:57,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:57,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:57,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:57,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:59,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:59,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:36:59,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:59,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-02 11:36:59,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:59,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:59,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:59,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 11:36:59,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:36:59,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:36:59,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:36:59,925 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-02 11:37:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:00,034 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-02 11:37:00,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:37:00,041 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-02 11:37:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:00,041 INFO L225 Difference]: With dead ends: 70 [2018-10-02 11:37:00,041 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:37:00,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:37:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:37:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 11:37:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 11:37:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-02 11:37:00,045 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-02 11:37:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:00,045 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-02 11:37:00,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:37:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-02 11:37:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-02 11:37:00,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:00,046 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-02 11:37:00,046 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:00,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-10-02 11:37:00,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:00,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:00,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:00,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:00,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:02,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:02,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:02,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:37:02,078 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:37:02,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:02,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:02,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:02,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 11:37:02,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:37:02,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:37:02,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:37:02,127 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-02 11:37:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:02,301 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 11:37:02,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:37:02,301 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-02 11:37:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:02,302 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:37:02,302 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:37:02,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:37:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:37:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 11:37:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:37:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-02 11:37:02,305 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-02 11:37:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:02,305 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-02 11:37:02,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:37:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-02 11:37:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:37:02,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:02,306 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-02 11:37:02,306 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:02,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-10-02 11:37:02,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:02,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:02,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:02,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:02,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:03,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:03,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:03,905 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:37:03,972 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-02 11:37:03,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:03,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:04,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:04,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:37:04,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:37:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:37:04,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:37:04,026 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-02 11:37:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:05,368 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-02 11:37:05,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:37:05,368 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-02 11:37:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:05,369 INFO L225 Difference]: With dead ends: 72 [2018-10-02 11:37:05,369 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 11:37:05,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:37:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 11:37:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 11:37:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 11:37:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-02 11:37:05,371 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-02 11:37:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:05,371 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-02 11:37:05,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:37:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-02 11:37:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 11:37:05,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:05,372 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-02 11:37:05,372 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:05,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-10-02 11:37:05,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:05,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:05,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:05,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:05,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:06,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:06,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:06,969 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:37:07,034 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-02 11:37:07,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:07,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:07,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:07,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-02 11:37:07,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:37:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:37:07,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:37:07,091 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-02 11:37:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:07,329 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 11:37:07,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:37:07,330 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-02 11:37:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:07,331 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:37:07,331 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:37:07,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:37:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:37:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:37:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:37:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 11:37:07,334 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-02 11:37:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:07,335 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 11:37:07,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:37:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 11:37:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:37:07,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:07,336 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-02 11:37:07,336 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:07,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:07,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-10-02 11:37:07,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:07,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:07,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:07,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:07,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:09,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:09,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:09,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:09,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:09,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:09,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:37:09,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:37:09,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:37:09,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:37:09,157 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-02 11:37:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:09,287 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-02 11:37:09,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:37:09,288 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-02 11:37:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:09,288 INFO L225 Difference]: With dead ends: 74 [2018-10-02 11:37:09,288 INFO L226 Difference]: Without dead ends: 72 [2018-10-02 11:37:09,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:37:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-02 11:37:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-02 11:37:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 11:37:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-02 11:37:09,291 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-02 11:37:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:09,292 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-02 11:37:09,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:37:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-02 11:37:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 11:37:09,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:09,293 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-02 11:37:09,293 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:09,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-10-02 11:37:09,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:09,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:09,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:09,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:09,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:11,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:11,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:11,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:37:11,504 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:37:11,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:11,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:11,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:11,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 11:37:11,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:37:11,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:37:11,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:37:11,541 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-02 11:37:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:11,741 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 11:37:11,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:37:11,741 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-02 11:37:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:11,742 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:37:11,742 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:37:11,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:37:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:37:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:37:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:37:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-02 11:37:11,744 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-02 11:37:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:11,744 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-02 11:37:11,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:37:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-02 11:37:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:37:11,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:11,745 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-02 11:37:11,745 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:11,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:11,745 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-10-02 11:37:11,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:11,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:11,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:11,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:11,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:13,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:13,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:13,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:37:13,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-02 11:37:13,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:13,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:13,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:13,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 11:37:13,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:37:13,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:37:13,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:37:13,623 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-02 11:37:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:14,035 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-02 11:37:14,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:37:14,035 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-02 11:37:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:14,036 INFO L225 Difference]: With dead ends: 76 [2018-10-02 11:37:14,036 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 11:37:14,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:37:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 11:37:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-02 11:37:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 11:37:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-02 11:37:14,041 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-02 11:37:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:14,042 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-02 11:37:14,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:37:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-02 11:37:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 11:37:14,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:14,042 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-02 11:37:14,043 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:14,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-10-02 11:37:14,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:14,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:14,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:14,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:14,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:16,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:16,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:16,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:37:16,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:37:16,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:16,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:16,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:16,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-02 11:37:16,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:37:16,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:37:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:37:16,733 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-02 11:37:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:16,947 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 11:37:16,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:37:16,947 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-02 11:37:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:16,948 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:37:16,948 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:37:16,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:37:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:37:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:37:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:37:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 11:37:16,951 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-02 11:37:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:16,951 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 11:37:16,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:37:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 11:37:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:37:16,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:16,952 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-02 11:37:16,952 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:16,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:16,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-10-02 11:37:16,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:16,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:16,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:16,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:16,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:18,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:18,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:18,845 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:37:18,958 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-02 11:37:18,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:18,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:19,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:19,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 11:37:19,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:37:19,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:37:19,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:37:19,010 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-02 11:37:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:19,313 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-02 11:37:19,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:37:19,313 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-02 11:37:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:19,314 INFO L225 Difference]: With dead ends: 78 [2018-10-02 11:37:19,314 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 11:37:19,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:37:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 11:37:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 11:37:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 11:37:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-02 11:37:19,318 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-02 11:37:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:19,318 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-02 11:37:19,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:37:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-02 11:37:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-02 11:37:19,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:19,319 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-02 11:37:19,319 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:19,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-10-02 11:37:19,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:19,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:19,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:19,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:19,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:21,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:21,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:21,586 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:37:21,659 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:37:21,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:21,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:21,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:21,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-02 11:37:21,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 11:37:21,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 11:37:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:37:21,712 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-02 11:37:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:21,830 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 11:37:21,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:37:21,830 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-02 11:37:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:21,831 INFO L225 Difference]: With dead ends: 79 [2018-10-02 11:37:21,831 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:37:21,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:37:21,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:37:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 11:37:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:37:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-02 11:37:21,835 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-02 11:37:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:21,836 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-02 11:37:21,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 11:37:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-02 11:37:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:37:21,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:21,836 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-02 11:37:21,837 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:21,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:21,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-10-02 11:37:21,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:21,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:21,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:21,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:21,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:23,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:23,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:23,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:23,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:23,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:23,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 11:37:23,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:37:23,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:37:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:37:23,843 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-02 11:37:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:24,005 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-02 11:37:24,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:37:24,005 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-02 11:37:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:24,006 INFO L225 Difference]: With dead ends: 80 [2018-10-02 11:37:24,006 INFO L226 Difference]: Without dead ends: 78 [2018-10-02 11:37:24,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:37:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-02 11:37:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-02 11:37:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-02 11:37:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-02 11:37:24,009 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-02 11:37:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:24,009 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-02 11:37:24,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:37:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-02 11:37:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-02 11:37:24,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:24,010 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-02 11:37:24,010 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:24,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-10-02 11:37:24,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:24,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:24,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:24,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:24,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:26,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:26,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:26,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:37:26,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:37:26,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:26,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:26,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:26,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-02 11:37:26,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:37:26,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:37:26,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:37:26,320 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-02 11:37:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:26,470 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 11:37:26,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:37:26,470 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-02 11:37:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:26,471 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:37:26,471 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:37:26,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:37:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:37:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:37:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:37:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-02 11:37:26,473 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-02 11:37:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:26,474 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-02 11:37:26,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:37:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-02 11:37:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:37:26,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:26,475 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-02 11:37:26,475 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:26,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:26,475 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-10-02 11:37:26,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:26,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:26,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:26,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:26,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:28,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:28,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:28,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:37:28,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-02 11:37:28,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:28,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:28,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:28,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 11:37:28,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:37:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:37:28,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:37:28,715 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-02 11:37:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:28,950 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-02 11:37:28,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:37:28,951 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-02 11:37:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:28,951 INFO L225 Difference]: With dead ends: 82 [2018-10-02 11:37:28,952 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 11:37:28,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:37:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 11:37:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-02 11:37:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 11:37:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-02 11:37:28,954 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-02 11:37:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:28,955 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-02 11:37:28,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:37:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-02 11:37:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 11:37:28,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:28,955 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-02 11:37:28,956 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:28,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-10-02 11:37:28,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:28,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:28,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:28,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:28,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:31,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:31,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:31,447 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:37:31,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:37:31,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:31,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:31,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:31,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-02 11:37:31,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 11:37:31,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 11:37:31,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:37:31,562 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-02 11:37:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:32,313 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 11:37:32,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:37:32,314 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-02 11:37:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:32,314 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:37:32,315 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 11:37:32,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:37:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 11:37:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 11:37:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 11:37:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-02 11:37:32,318 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-02 11:37:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:32,318 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-02 11:37:32,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-02 11:37:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-02 11:37:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:37:32,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:32,319 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-02 11:37:32,319 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:32,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:32,319 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-10-02 11:37:32,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:32,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:32,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:32,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:32,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:34,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:34,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:34,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:37:34,727 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-02 11:37:34,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:34,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:34,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:34,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-02 11:37:34,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:37:34,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:37:34,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:37:34,783 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-02 11:37:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:36,106 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-02 11:37:36,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:37:36,107 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-02 11:37:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:36,108 INFO L225 Difference]: With dead ends: 84 [2018-10-02 11:37:36,108 INFO L226 Difference]: Without dead ends: 82 [2018-10-02 11:37:36,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:37:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-02 11:37:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-02 11:37:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 11:37:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-02 11:37:36,110 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-02 11:37:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:36,110 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-02 11:37:36,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:37:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-02 11:37:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-02 11:37:36,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:36,111 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-02 11:37:36,111 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:36,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-10-02 11:37:36,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:36,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:36,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:36,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:36,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:38,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:38,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:38,309 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:37:38,625 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-02 11:37:38,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:38,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:38,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:38,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-02 11:37:38,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-02 11:37:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-02 11:37:38,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:37:38,685 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-02 11:37:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:38,978 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 11:37:38,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:37:38,979 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-02 11:37:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:38,980 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:37:38,980 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:37:38,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:37:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:37:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:37:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:37:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-02 11:37:38,982 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-02 11:37:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:38,983 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-02 11:37:38,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-02 11:37:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-02 11:37:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:37:38,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:38,984 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-02 11:37:38,984 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:38,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:38,984 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-10-02 11:37:38,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:38,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:38,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:38,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:38,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:41,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:41,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:41,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:41,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:41,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:41,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-02 11:37:41,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:37:41,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:37:41,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:37:41,659 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-02 11:37:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:41,829 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-02 11:37:41,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:37:41,830 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-02 11:37:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:41,831 INFO L225 Difference]: With dead ends: 86 [2018-10-02 11:37:41,831 INFO L226 Difference]: Without dead ends: 84 [2018-10-02 11:37:41,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:37:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-02 11:37:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-02 11:37:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 11:37:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-02 11:37:41,835 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-02 11:37:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:41,836 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-02 11:37:41,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:37:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-02 11:37:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 11:37:41,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:41,836 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-02 11:37:41,837 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:41,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-10-02 11:37:41,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:41,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:41,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:41,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:41,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:44,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:44,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:44,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:37:44,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:37:44,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:44,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:44,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:44,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-02 11:37:44,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:37:44,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:37:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:37:44,464 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-02 11:37:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:44,660 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 11:37:44,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:37:44,660 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-02 11:37:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:44,660 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:37:44,661 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:37:44,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:37:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:37:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:37:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:37:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-02 11:37:44,663 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-02 11:37:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:44,663 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-02 11:37:44,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 11:37:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-02 11:37:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:37:44,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:44,664 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-02 11:37:44,664 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:44,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-10-02 11:37:44,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:44,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:44,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:44,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:44,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:47,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:47,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:47,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:37:47,755 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-02 11:37:47,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:47,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:47,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:47,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-02 11:37:47,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:37:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:37:47,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:37:47,797 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-02 11:37:47,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:47,978 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-02 11:37:47,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-02 11:37:47,978 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-02 11:37:47,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:47,979 INFO L225 Difference]: With dead ends: 88 [2018-10-02 11:37:47,979 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 11:37:47,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:37:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 11:37:47,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-02 11:37:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 11:37:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-02 11:37:47,981 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-02 11:37:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:47,982 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-02 11:37:47,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:37:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-02 11:37:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-02 11:37:47,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:47,983 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-02 11:37:47,983 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:47,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-10-02 11:37:47,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:47,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:47,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:47,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:47,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:50,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:50,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:50,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:37:50,585 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:37:50,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:50,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:50,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:50,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-02 11:37:50,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-02 11:37:50,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-02 11:37:50,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:37:50,644 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-02 11:37:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:50,946 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 11:37:50,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 11:37:50,947 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-02 11:37:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:50,947 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:37:50,948 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:37:50,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:37:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:37:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 11:37:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:37:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-02 11:37:50,951 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-02 11:37:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:50,952 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-02 11:37:50,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-02 11:37:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-02 11:37:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:37:50,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:50,953 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-02 11:37:50,953 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:50,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-10-02 11:37:50,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:50,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:50,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:50,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:50,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:53,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:53,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:53,676 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:37:53,768 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-02 11:37:53,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:53,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:53,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:53,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-02 11:37:53,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:37:53,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:37:53,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:37:53,809 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-02 11:37:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:54,130 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-02 11:37:54,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-02 11:37:54,130 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-02 11:37:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:54,130 INFO L225 Difference]: With dead ends: 90 [2018-10-02 11:37:54,131 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 11:37:54,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:37:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 11:37:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-02 11:37:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 11:37:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-02 11:37:54,134 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-02 11:37:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:54,134 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-02 11:37:54,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:37:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-02 11:37:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-02 11:37:54,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:54,135 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-02 11:37:54,135 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:54,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:54,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-10-02 11:37:54,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:54,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:54,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:54,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:54,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:57,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:57,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:37:57,128 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:37:57,216 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:37:57,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:57,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:57,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:57,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-02 11:37:57,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-02 11:37:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-02 11:37:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:37:57,259 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-02 11:37:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:57,462 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 11:37:57,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-02 11:37:57,462 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-02 11:37:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:57,463 INFO L225 Difference]: With dead ends: 91 [2018-10-02 11:37:57,463 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:37:57,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:37:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:37:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 11:37:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 11:37:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-02 11:37:57,465 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-02 11:37:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:57,466 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-02 11:37:57,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-02 11:37:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-02 11:37:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:37:57,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:57,467 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-02 11:37:57,467 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:57,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-10-02 11:37:57,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:57,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:57,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:57,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:57,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:00,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:00,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:00,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:38:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:00,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:00,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:00,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-02 11:38:00,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:38:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:38:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:38:00,412 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-02 11:38:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:00,565 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-02 11:38:00,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-02 11:38:00,566 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-02 11:38:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:00,566 INFO L225 Difference]: With dead ends: 92 [2018-10-02 11:38:00,567 INFO L226 Difference]: Without dead ends: 90 [2018-10-02 11:38:00,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:38:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-02 11:38:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-02 11:38:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-02 11:38:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-02 11:38:00,569 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-02 11:38:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:00,570 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-02 11:38:00,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:38:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-02 11:38:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 11:38:00,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:00,571 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-02 11:38:00,571 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:00,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-10-02 11:38:00,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:00,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:00,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:00,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:38:00,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:03,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:03,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:03,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:38:03,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:38:03,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:03,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:03,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:03,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-02 11:38:03,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 11:38:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 11:38:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:38:03,789 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-02 11:38:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:03,989 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 11:38:03,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 11:38:03,989 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-02 11:38:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:03,990 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:38:03,990 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:38:03,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:38:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:38:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:38:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:38:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-02 11:38:03,992 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-02 11:38:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:03,992 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-02 11:38:03,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 11:38:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-02 11:38:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:38:03,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:03,993 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-02 11:38:03,993 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:03,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-10-02 11:38:03,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:03,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:03,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:03,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:03,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:06,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:06,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:06,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:38:07,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-02 11:38:07,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:07,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:07,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:07,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-02 11:38:07,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:38:07,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:38:07,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:38:07,076 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-02 11:38:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:07,276 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-02 11:38:07,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-02 11:38:07,276 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-02 11:38:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:07,277 INFO L225 Difference]: With dead ends: 94 [2018-10-02 11:38:07,277 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 11:38:07,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:38:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 11:38:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-02 11:38:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 11:38:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-02 11:38:07,280 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-02 11:38:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:07,280 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-02 11:38:07,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:38:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-02 11:38:07,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-02 11:38:07,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:07,281 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-02 11:38:07,281 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:07,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:07,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-10-02 11:38:07,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:07,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:07,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:07,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:07,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:10,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:10,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:10,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:38:10,165 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:38:10,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:10,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:10,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:10,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-02 11:38:10,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-02 11:38:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-02 11:38:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:38:10,205 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-02 11:38:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:10,328 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 11:38:10,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-02 11:38:10,329 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-02 11:38:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:10,330 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:38:10,330 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:38:10,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:38:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:38:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 11:38:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 11:38:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-02 11:38:10,333 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-02 11:38:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:10,333 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-02 11:38:10,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-02 11:38:10,334 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-02 11:38:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:38:10,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:10,334 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-02 11:38:10,334 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:10,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-10-02 11:38:10,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:10,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:10,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:10,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:10,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:13,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:13,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:13,483 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:38:13,585 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-02 11:38:13,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:13,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:13,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:13,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-02 11:38:13,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:38:13,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:38:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:38:13,627 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-02 11:38:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:13,847 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-02 11:38:13,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-02 11:38:13,847 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-02 11:38:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:13,848 INFO L225 Difference]: With dead ends: 96 [2018-10-02 11:38:13,848 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 11:38:13,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:38:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 11:38:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-02 11:38:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 11:38:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-02 11:38:13,850 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-02 11:38:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:13,850 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-02 11:38:13,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:38:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-02 11:38:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 11:38:13,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:13,851 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-02 11:38:13,851 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:13,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-10-02 11:38:13,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:13,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:13,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:13,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:13,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:17,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:17,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:17,079 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:38:17,180 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-02 11:38:17,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:17,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:17,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:17,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-02 11:38:17,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-02 11:38:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-02 11:38:17,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:38:17,221 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-02 11:38:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:17,456 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 11:38:17,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 11:38:17,457 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-02 11:38:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:17,457 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:38:17,458 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:38:17,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:38:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:38:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:38:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:38:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-02 11:38:17,460 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-02 11:38:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:17,461 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-02 11:38:17,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-02 11:38:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-02 11:38:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:38:17,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:17,462 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-02 11:38:17,462 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:17,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-10-02 11:38:17,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:17,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:17,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:17,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:17,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:20,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:20,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:20,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:38:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:20,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:20,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:20,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-02 11:38:20,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:38:20,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:38:20,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:38:20,564 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-02 11:38:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:20,773 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-02 11:38:20,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-02 11:38:20,774 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-02 11:38:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:20,774 INFO L225 Difference]: With dead ends: 98 [2018-10-02 11:38:20,774 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 11:38:20,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:38:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 11:38:20,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-02 11:38:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-02 11:38:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-02 11:38:20,777 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-02 11:38:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:20,778 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-02 11:38:20,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:38:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-02 11:38:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-02 11:38:20,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:20,778 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-02 11:38:20,778 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:20,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-10-02 11:38:20,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:20,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:20,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:20,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:38:20,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:24,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:24,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:24,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:38:24,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:38:24,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:24,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:24,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:24,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-02 11:38:24,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-02 11:38:24,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-02 11:38:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:38:24,226 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-02 11:38:24,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:24,427 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 11:38:24,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-02 11:38:24,427 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-02 11:38:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:24,428 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:38:24,428 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 11:38:24,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:38:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 11:38:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 11:38:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 11:38:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-02 11:38:24,431 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-02 11:38:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:24,431 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-02 11:38:24,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-02 11:38:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-02 11:38:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 11:38:24,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:24,432 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-02 11:38:24,432 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:24,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:24,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-10-02 11:38:24,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:24,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:24,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:24,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:24,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:28,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:28,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:28,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:38:28,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-02 11:38:28,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:28,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:28,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:28,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-02 11:38:28,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:38:28,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:38:28,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:38:28,759 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-02 11:38:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:28,944 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-02 11:38:28,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-02 11:38:28,944 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-02 11:38:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:28,945 INFO L225 Difference]: With dead ends: 100 [2018-10-02 11:38:28,945 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 11:38:28,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:38:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 11:38:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-02 11:38:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-02 11:38:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-02 11:38:28,947 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-02 11:38:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:28,948 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-02 11:38:28,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:38:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-02 11:38:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-02 11:38:28,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:28,948 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-02 11:38:28,948 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:28,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-10-02 11:38:28,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:28,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:28,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:28,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:28,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:32,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:32,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:32,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:38:32,433 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:38:32,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:32,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:32,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:32,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-02 11:38:32,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-02 11:38:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-02 11:38:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:38:32,476 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-02 11:38:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:32,685 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 11:38:32,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-02 11:38:32,685 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-02 11:38:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:32,686 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:38:32,686 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:38:32,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:38:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:38:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 11:38:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:38:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-02 11:38:32,689 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-02 11:38:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:32,690 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-02 11:38:32,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-02 11:38:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-02 11:38:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:38:32,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:32,691 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-02 11:38:32,691 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:32,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-10-02 11:38:32,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:32,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:32,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:32,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:32,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:35,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:35,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:35,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:38:36,024 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-02 11:38:36,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:36,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:36,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:36,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-02 11:38:36,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:38:36,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:38:36,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:38:36,067 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-02 11:38:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:36,804 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-02 11:38:36,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-02 11:38:36,804 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-02 11:38:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:36,805 INFO L225 Difference]: With dead ends: 102 [2018-10-02 11:38:36,805 INFO L226 Difference]: Without dead ends: 100 [2018-10-02 11:38:36,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:38:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-02 11:38:36,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-02 11:38:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 11:38:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-02 11:38:36,807 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-02 11:38:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:36,808 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-02 11:38:36,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:38:36,808 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-02 11:38:36,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-02 11:38:36,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:36,808 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-02 11:38:36,809 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:36,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-10-02 11:38:36,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:36,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:36,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:36,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:36,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:40,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:40,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:40,190 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:38:40,299 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:38:40,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:40,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:40,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:40,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-02 11:38:40,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-02 11:38:40,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-02 11:38:40,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-02 11:38:40,342 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-02 11:38:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:40,618 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 11:38:40,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-02 11:38:40,618 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-02 11:38:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:40,619 INFO L225 Difference]: With dead ends: 103 [2018-10-02 11:38:40,619 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:38:40,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-02 11:38:40,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:38:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:38:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:38:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-02 11:38:40,622 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-02 11:38:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:40,622 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-02 11:38:40,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-02 11:38:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-02 11:38:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:38:40,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:40,623 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-02 11:38:40,623 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:40,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:40,623 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-10-02 11:38:40,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:40,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:40,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:40,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:40,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:44,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:44,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:44,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:38:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:44,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:44,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:44,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-02 11:38:44,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 11:38:44,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 11:38:44,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:38:44,455 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-02 11:38:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:44,718 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-02 11:38:44,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-02 11:38:44,718 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-02 11:38:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:44,719 INFO L225 Difference]: With dead ends: 104 [2018-10-02 11:38:44,719 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 11:38:44,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:38:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 11:38:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-02 11:38:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-02 11:38:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-02 11:38:44,722 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-02 11:38:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:44,722 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-02 11:38:44,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 11:38:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-02 11:38:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 11:38:44,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:44,722 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-02 11:38:44,722 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:44,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:44,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-10-02 11:38:44,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:44,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:44,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:44,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:38:44,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:48,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:48,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:48,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:38:48,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:38:48,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:48,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:48,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:48,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-02 11:38:48,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-02 11:38:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-02 11:38:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-02 11:38:48,575 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-02 11:38:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:48,867 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 11:38:48,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-02 11:38:48,867 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-02 11:38:48,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:48,868 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:38:48,868 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:38:48,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-02 11:38:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:38:48,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:38:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:38:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-02 11:38:48,872 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-02 11:38:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:48,872 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-02 11:38:48,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-02 11:38:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-02 11:38:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:38:48,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:48,873 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-02 11:38:48,873 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:48,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-10-02 11:38:48,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:48,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:48,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:48,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:48,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:52,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:52,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:52,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:38:52,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-02 11:38:52,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:52,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:52,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:52,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-02 11:38:52,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 11:38:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 11:38:52,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:38:52,749 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-02 11:38:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:53,015 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-02 11:38:53,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-02 11:38:53,016 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-02 11:38:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:53,016 INFO L225 Difference]: With dead ends: 106 [2018-10-02 11:38:53,016 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 11:38:53,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:38:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 11:38:53,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-02 11:38:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 11:38:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-02 11:38:53,019 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-02 11:38:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:53,019 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-02 11:38:53,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 11:38:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-02 11:38:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-02 11:38:53,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:53,020 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-02 11:38:53,021 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:53,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:53,021 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-10-02 11:38:53,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:53,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:53,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:53,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:53,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:56,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:56,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:56,550 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:38:56,631 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:38:56,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:56,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:56,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:56,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-02 11:38:56,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-02 11:38:56,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-02 11:38:56,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:38:56,676 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-02 11:38:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:56,868 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 11:38:56,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-02 11:38:56,868 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-02 11:38:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:56,869 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:38:56,870 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 11:38:56,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:38:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 11:38:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 11:38:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 11:38:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-02 11:38:56,874 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-02 11:38:56,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:56,874 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-02 11:38:56,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-02 11:38:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-02 11:38:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:38:56,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:56,875 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-02 11:38:56,875 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:56,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-10-02 11:38:56,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:56,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:56,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:56,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:56,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:00,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:00,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:00,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:39:00,956 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-02 11:39:00,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:00,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:01,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:01,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-02 11:39:01,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 11:39:01,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 11:39:01,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:39:01,003 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-02 11:39:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:01,233 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-02 11:39:01,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-02 11:39:01,234 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-02 11:39:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:01,235 INFO L225 Difference]: With dead ends: 108 [2018-10-02 11:39:01,235 INFO L226 Difference]: Without dead ends: 106 [2018-10-02 11:39:01,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:39:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-02 11:39:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-02 11:39:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 11:39:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-02 11:39:01,238 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-02 11:39:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:01,239 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-02 11:39:01,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 11:39:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-02 11:39:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-02 11:39:01,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:01,240 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-02 11:39:01,240 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:01,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:01,240 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-10-02 11:39:01,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:01,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:01,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:01,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:01,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:05,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:05,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:05,324 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:39:05,439 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-02 11:39:05,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:05,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:05,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:05,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-02 11:39:05,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-02 11:39:05,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-02 11:39:05,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-02 11:39:05,486 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-02 11:39:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:05,780 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 11:39:05,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-02 11:39:05,780 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-02 11:39:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:05,780 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:39:05,781 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:39:05,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-02 11:39:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:39:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 11:39:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:39:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-02 11:39:05,784 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-02 11:39:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:05,784 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-02 11:39:05,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-02 11:39:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-02 11:39:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:39:05,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:05,784 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-02 11:39:05,785 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:05,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-10-02 11:39:05,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:05,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:05,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:05,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:05,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:09,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:09,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:09,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:09,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:10,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:10,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-02 11:39:10,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 11:39:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 11:39:10,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:39:10,039 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-02 11:39:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:10,344 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-02 11:39:10,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-02 11:39:10,345 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-02 11:39:10,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:10,345 INFO L225 Difference]: With dead ends: 110 [2018-10-02 11:39:10,345 INFO L226 Difference]: Without dead ends: 108 [2018-10-02 11:39:10,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:39:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-02 11:39:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-02 11:39:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 11:39:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-02 11:39:10,348 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-02 11:39:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:10,348 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-02 11:39:10,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 11:39:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-02 11:39:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 11:39:10,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:10,349 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-02 11:39:10,349 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:10,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:10,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-10-02 11:39:10,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:10,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:10,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:10,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:10,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:14,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:14,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:14,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:39:14,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:39:14,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:14,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:14,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:14,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-02 11:39:14,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-02 11:39:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-02 11:39:14,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:39:14,674 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-02 11:39:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:14,997 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 11:39:14,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-02 11:39:14,998 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-02 11:39:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:14,998 INFO L225 Difference]: With dead ends: 111 [2018-10-02 11:39:14,998 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 11:39:14,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:39:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 11:39:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 11:39:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 11:39:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-02 11:39:15,002 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-02 11:39:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:15,002 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-02 11:39:15,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-02 11:39:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-02 11:39:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 11:39:15,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:15,003 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-02 11:39:15,003 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:15,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-10-02 11:39:15,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:15,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:15,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:15,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:15,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:19,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:19,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:19,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:39:19,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-02 11:39:19,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:19,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:19,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:19,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-02 11:39:19,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-02 11:39:19,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-02 11:39:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:39:19,405 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-02 11:39:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:19,714 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-02 11:39:19,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-02 11:39:19,715 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-02 11:39:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:19,715 INFO L225 Difference]: With dead ends: 112 [2018-10-02 11:39:19,715 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 11:39:19,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:39:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 11:39:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-02 11:39:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-02 11:39:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-02 11:39:19,717 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-02 11:39:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:19,718 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-02 11:39:19,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-02 11:39:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-02 11:39:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-02 11:39:19,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:19,718 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-02 11:39:19,719 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:19,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:19,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1103805603, now seen corresponding path program 106 times [2018-10-02 11:39:19,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:19,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:19,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:19,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:19,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:24,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:24,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:24,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:39:24,143 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:39:24,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:24,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:24,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:24,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-02 11:39:24,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-02 11:39:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-02 11:39:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-02 11:39:24,189 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-02 11:39:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:24,535 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 11:39:24,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-02 11:39:24,535 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-02 11:39:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:24,535 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:39:24,535 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:39:24,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-02 11:39:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:39:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 11:39:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:39:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-02 11:39:24,538 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-02 11:39:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:24,538 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-02 11:39:24,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-02 11:39:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-02 11:39:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:39:24,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:24,539 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-02 11:39:24,539 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:24,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash -141762868, now seen corresponding path program 107 times [2018-10-02 11:39:24,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:24,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:24,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:24,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:24,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:29,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:29,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:29,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:39:29,175 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-02 11:39:29,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:29,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:29,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:29,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-02 11:39:29,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 11:39:29,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 11:39:29,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:39:29,223 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-02 11:39:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:29,563 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-02 11:39:29,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-02 11:39:29,563 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-02 11:39:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:29,563 INFO L225 Difference]: With dead ends: 114 [2018-10-02 11:39:29,563 INFO L226 Difference]: Without dead ends: 112 [2018-10-02 11:39:29,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:39:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-02 11:39:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-02 11:39:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 11:39:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-02 11:39:29,566 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-02 11:39:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:29,566 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-02 11:39:29,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 11:39:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-02 11:39:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 11:39:29,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:29,567 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-02 11:39:29,567 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:29,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:29,567 INFO L82 PathProgramCache]: Analyzing trace with hash -99679805, now seen corresponding path program 108 times [2018-10-02 11:39:29,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:29,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:29,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:29,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:29,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:34,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:34,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:34,102 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:39:34,226 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:39:34,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:34,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:34,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:34,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-02 11:39:34,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-02 11:39:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-02 11:39:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-02 11:39:34,279 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-10-02 11:39:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:34,597 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 11:39:34,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-02 11:39:34,597 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-10-02 11:39:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:34,597 INFO L225 Difference]: With dead ends: 115 [2018-10-02 11:39:34,597 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:39:34,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-02 11:39:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:39:34,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 11:39:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 11:39:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-02 11:39:34,600 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-02 11:39:34,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:34,600 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-02 11:39:34,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-02 11:39:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-02 11:39:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 11:39:34,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:34,601 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-02 11:39:34,601 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:34,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1204895148, now seen corresponding path program 109 times [2018-10-02 11:39:34,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:34,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:34,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:34,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:34,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:39,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:39,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:39,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:39,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:39,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:39,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-02 11:39:39,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-02 11:39:39,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-02 11:39:39,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:39:39,339 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-10-02 11:39:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:39,634 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-02 11:39:39,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-02 11:39:39,635 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-10-02 11:39:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:39,635 INFO L225 Difference]: With dead ends: 116 [2018-10-02 11:39:39,635 INFO L226 Difference]: Without dead ends: 114 [2018-10-02 11:39:39,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:39:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-02 11:39:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-02 11:39:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-02 11:39:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-02 11:39:39,639 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-10-02 11:39:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:39,639 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-02 11:39:39,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-02 11:39:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-02 11:39:39,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-02 11:39:39,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:39,640 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-10-02 11:39:39,640 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:39,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:39,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1302954269, now seen corresponding path program 110 times [2018-10-02 11:39:39,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:39,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:39,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:39,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:39,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 11:39:41,106 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:39:41,110 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:39:41,111 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:39:41 BoogieIcfgContainer [2018-10-02 11:39:41,111 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:39:41,112 INFO L168 Benchmark]: Toolchain (without parser) took 230542.69 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -44.6 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 359.4 MB). Peak memory consumption was 314.8 MB. Max. memory is 7.1 GB. [2018-10-02 11:39:41,113 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:39:41,114 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:39:41,114 INFO L168 Benchmark]: Boogie Preprocessor took 19.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:39:41,114 INFO L168 Benchmark]: RCFGBuilder took 305.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2018-10-02 11:39:41,114 INFO L168 Benchmark]: TraceAbstraction took 230170.80 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -44.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 340.4 MB). Peak memory consumption was 295.8 MB. Max. memory is 7.1 GB. [2018-10-02 11:39:41,116 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 305.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 230170.80 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -44.6 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 340.4 MB). Peak memory consumption was 295.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 114 with TraceHistMax 110, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 62 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 230.1s OverallTime, 111 OverallIterations, 110 TraceHistogramMax, 22.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 331 SDtfs, 0 SDslu, 4759 SDs, 0 SdLazy, 10973 SolverSat, 163 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12428 GetRequests, 6323 SyntacticMatches, 0 SemanticMatches, 6105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 189.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 110 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 193.8s InterpolantComputationTime, 12647 NumberOfCodeBlocks, 12647 NumberOfCodeBlocksAsserted, 1776 NumberOfCheckSat, 12428 ConstructedInterpolants, 0 QuantifiedInterpolants, 2747462 SizeOfPredicates, 109 NumberOfNonLiveVariables, 37932 ConjunctsInSsa, 6213 ConjunctsInUnsatCore, 219 InterpolantComputations, 1 PerfectInterpolantSequences, 0/443630 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-39-41-126.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-39-41-126.csv Completed graceful shutdown